# create a simple raid6 set mdadm -CfR $md0 -e0.90 -l 6 -n4 $dev0 $dev1 $dev2 $dev3 check resync ; check raid6 testdev $md0 2 $mdsize0 512 mdadm -S $md0 # now with version-1 superblock mdadm -CR $md0 -e1 --level=raid6 -n5 $dev0 $dev1 $dev2 $dev3 $dev4 check resync ; check raid6 testdev $md0 3 $mdsize1 512 mdadm -S $md0 exit 0